FR2733737A1 - DEVICE FOR STACKING PRINTING SHEETS DURING AUTOMATED BATTERY CHANGE ON SHEET-PROCESSING MACHINE AND METHOD FOR PERFORMING BATTERY CHANGE USING SAID DEVICE - Google Patents

Abstract

The present invention relates to a device for stacking printing sheets (7) during an automated stack change on a sheet processing machine, comprising a feeder, an outlet and auxiliary stack lifting devices using pallets (1) having cell surfaces subdivided by groove-shaped interruptions (4) between support members (3) of the bar type. - According to the invention, compensation elements (5) are provided, which can be introduced into the interruptions (4) in the form of grooves, so that they form, with the support elements (3) of the bar type , a common surface in a plane, and the compensation elements (5) form, with the pallets (1), a unit.

Description

The present invention relates to a device for stacking sheets

  method for printing an automated stack change on a sheet processing machine, comprising a feeder, an output and auxiliary pile lifting devices using pallets having stack surfaces subdivided by groove-like interruptions between support elements of the bar type, for the introduction of auxiliary battery supports in the form of

bars or rakes.

  Pallets are known for the automated processing of

  stacks of leaves on graphic machines, which

  grooves. These grooves, which thus form an interrupted battery support surface, serve to receive support means that can support partial stacks, both during uninterrupted feeding.

  sheet material than during the uninterrupted evacuation

broken from the sheet material.

  A pallet of this type is known from German Utility Model 1,797,252. The auxiliary grid described for stack tables is formed by a stack plate having strips arranged separately. The bars form, together with the battery plate, longitudinal recesses in the form of grooves in which one can

introduce bars or rakes.

  This pallet has the disadvantage that the stacked sheet material collapses in the grooves, thus deforming and can even cause damage to the image

  printed in the area of the exit.

  DE-4 344 361 discloses a further provision

  tif to form stacks of individual sheets. In this case, a grooved pallet is used to automatically receive stacks of sheets at a

  output of a printing machine. To avoid a collapse

  In the area of the grooves, the sheet material is provided with an auxiliary plate on auxiliary raster stacking devices, which covers the grooves. Thus, no automated processing in the subsequent workflow is no longer

  possible, in any case a formation of partial stack.

  Accordingly, the object of the invention is to provide a pallet which avoids the problem of the deformation of the stacked sheets as well as the treatment

automated follow-up.

  For this purpose, the device of the type indicated above is remarkable, according to the invention, in that compensating elements are provided, which can be introduced into the interruptions in the form of grooves, so that they form, with the support members of the bar type, a common surface in or about one plane, and in that the compensation elements form, with the pallets,

a unit.

  The embodiment according to the invention of the pallet also makes it possible to close the grooves in the zone of reception of the piles by plate elements being able to be raised at the height of the surface of the pallets that also the arrangement of elements of stacking auxiliaries connected to the grooved pallet. In the latter case, it is proposed a particular method adapted to the logistics of a printing press for the use, related to each other, of pallets and

  auxiliary stacking elements.

  Advantageously, the compensating elements can be raised and lowered in the groove-like interruptions, so that they release the groove-shaped interruptions in the deepest position between the bar-type bearing elements and, in the highest position, are at least approximately at the level of the support elements of the bar type, and the elements of

  compensation are connected to the pallets.

  Preferably, the compensating elements are arranged in the slots in the form of grooves that can be put in place and removed in a longitudinally mobile manner, so that when the compensation elements are put in place, their area is at least approximately level of the bar-type support elements, and when the compensating elements are removed, the groove-like interrupts are released, and the

  compensation elements are separable from the pallets.

  In addition, the compensating elements can be raised and lowered in grooves of the pallet by means of a

  lifting device connected to the pallet.

  In particular, the compensation elements can be

  made in the form of bars and are adapted, in

the grooves of the pallet.

  Preferably, the compensation elements are made as a compensation device in the form of a grid and are adapted to the grooves in the form of a pattern of grooves

  surrounding the support of the pile surface of the pallet.

  In addition, the compensation elements can be made in the form of bars or rakes and are arranged in a groove of the pallet that can be put in place or

  removed longitudinally movably.

  In addition, the compensating elements can be formed as rakes with a transverse bar and support rods connected thereto, and the support rods.

are adapted to the grooves.

  Preferably, the compensation elements have connecting means to the auxiliary lifting devices of

  stack on the feeder or outlet, and the auxiliary devices

  stack lifting devices present ways to maintain

  compensating devices, so that the compensation devices can be automatically raised and lowered in the feeder or

than set up and / or removed.

  The present invention also relates to a method for performing a battery change using the device which has just been described, a process that is remarkable in that: a pallet with a stack of sheets is fed to the feeder; pile, a remaining pile of

  leaves shall be received by keeping and lifting the

  tif compensation by means of an auxiliary battery lifting device of the feeder, -the pallet is separated from the compensation device, removed from the feeder, and transported to the output, - after carrying the supply of a new stack of sheets, the compensation device is removed from the feeder, to collect the remaining pile and the new stack of sheets, and is transported to the outlet, - at the beginning of the stack change at the outlet, a compensation device is introduced in the outlet and, to form a partial stack, is received by holding and lowering an auxiliary battery lifting device of the outlet, and - after evacuation of a complete output stack and supplying an empty pallet, the latter is raised against the pile

  partial and, thus, united with the compensatory

  the compensation device is then released

  auxiliary battery lifting device.

  The figures of the appended drawing will make it clear how the invention can be realized.

  Figure 1 is a side view of a pallet.

  Figure 2 is a top view of a pallet of another type. Figure 3 shows a pallet with a battery holder

auxiliary.

  Figure 4 illustrates a flow diagram of the usage process. In Figure 1, there is shown a pallet 1 which is

  provided with bars 3 on a support plate 2 and comprising

  4 grooves 4 may be inserted into the grooves 4 in the form of rakes, forks or the like. At the bottom of the grooves 4, compensation elements 5 are arranged. The compensation elements 5 are coupled to lifting devices 6,

  by which they can be raised, in the posi-

  This is shown in broken lines parallel to the upper edge of the bars 3. The lifting devices 6 are not shown in detail. They can be formed by simple means, for example in the form of levers, eccentric or keys. Thus, a printing sheet 7 resting on the pallet 1 has a continuous receiving surface. As a general rule, all the lifting devices 6 are controlled jointly to make the surface of

  battery holder or to release the grooves 4.

  The lifting devices 6 may also be individually controlled to permanently close or open specific grooves 4. The lifting devices 6 are arranged so that engagement openings on the underside of the pallet 1, which are provided for means of transport, are not narrowed. The normal transport of

batteries is also not bothered.

  In Figure 2, there is shown a particular form of a pallet having a network of grooves 8 formed of longitudinal grooves and transverse grooves. Thus, the stack support surface is only formed by rectangular receivers 9. As compensating element, there is provided a network compensation device 10, which

  surrounds all the receivers 9. For this compensating device

  10, there is provided a lifting device for lifting all over the surface in the pallet. For the sake of simplification, it is also possible in this case, as in FIG.

  5. It then remains between the recep-

  9, depending on the orientation of the compensation elements, each time a small free space in which the printing sheets 7 are not supported. This is however more acceptable than a continuously open groove 3 or

the open groove network 8.

  The operation of palette 1 is as follows. When a stack of sheets is delivered to a feeder of a sheet processing machine, the stack surface can be made flat by lifting the compensating elements 5 or the compensation device 10. Thus, the stack of sheets

  is in the optimal state for its treatment. When changing

  In the automated system, the lifting device 6 on the pallet 1 can be actuated remotely, for example from the feeder, so that an auxiliary battery support device can be introduced into the now open grooves 4. At this time, this is no longer embarrassing since still relatively

  little printing material is on pallet 1.

  After removal of the pallet 1 from the feeder, it is transported to the outlet at the other end of the sheet processing machine. Like, in the output, we use

  again, where appropriate, a support device

  pile stack in the form of bars or rakes, the grooves

  res 4 can still be left open. When a partial stack deposited on the auxiliary battery support device is received in the outlet, the grooves 4 become effective again in that the pallet 1 is moved from the bottom against the partial stack, the bars 3 coming to bear against the underside of the partial pile. After removal of the auxiliary battery support device, the lifting device 6 can be activated from the output again remotely and thus the battery support surface can be made flat by lifting the compensation elements 5 Since, at this moment, relatively few leaves are on pallet 1, the risk of

  damage to the printed image is deleted.

  By using the pallet according to FIG. 2, different systems of auxiliary battery support devices can be implemented, also on the same sheet processing machine. The procedure indicated is also valid for a

  further processing in other systems.

  In Fig. 3 there is shown another system for closing the grooves in a pallet for an automated stack change on sheet processing machines. On the pallet 11, a compensating element 12 is arranged removably. It is arranged between bars 13 in grooves 14 and consists of a cross-member 15 and support bars 16. In order to accommodate the compensation element 12 on the pallet 11, the bars 13 are shortened on one side. At this point, the crosspiece 15 is then on the pallet 11. The arrangement can also be chosen so that two compensation elements 12 are introduced into the grooves 14 on both sides of the pallet 11. The orientation can be optimized so that the necessary shortening of the bars 13 takes place on the sides which are not necessary for alignment of the edges of the stack of sheets. If this is not the case, the cross-member 15 can also be arranged outside the

pallet 11.

  With pallet 11, a particular method for changing stacks of sheets on sheet processing machines is possible. This happens as follows. In Fig. 4, a sheet processing station 17 having a feeder 18 and an outlet 19 is shown. A stack of sheets 20 is fed to the feeder 18. In addition, a compensating member 12 is disposed on the pallet 11 below the stack of sheets 20, so that the stack of sheets 20 rests on a smooth surface. The cross member 15 of the compensating element 12 protrudes above the edges of the stack of sheets 20. When the stack of sheets 20 is processed in the feeder 18, the compensation element 12 is received on its projections, c that is to say on the crossmember 15 and, where appropriate, also on the support bars 16 by an auxiliary lifting device arranged in the feeder 18 and known per se. Thus, the remainder of the stack of sheets 20 can be further processed and the pallet 11 can be lowered without the compensation element 12, away from the feeder 18 and

  transported, in any way, to exit 19.

  When a new stack of sheets 20 is introduced and raised in the feeder 18, the compensation element 12 can be removed, for example by means of the auxiliary lifting device, so that the pile remains

  on the new pile of leaves 20. The compensating element

  tion 12 can then be used again.

  In FIG. 4, the compensating element 12 is brought, like the pallet 11, to the outlet 19. Here, it is put in place during the next stack change, that is to say when an output stack of complete height has been produced, in an auxiliary lifting device provided in the outlet 19. By means of the auxiliary lifting device, it can then be

  formed, for the duration of the battery change, a battery

  The pallet 11 and the compensating element are brought together and form a smooth receiver for the stack of printed sheets by feeding the pallet 11 and lifting up to the compensating element 12. Damage to the image printed on the printing sheet is not possible. From the described flow, a closed circuit is obtained for the pallets 11 and

compensating elements 12.

  The compensation elements 12 may have a number of support bars 16 different from the number of grooves 14 in the pallet 11. Depending on the material to be treated, it may be sufficient to occupy only each second groove 14 by a support bar 16. two or more narrow support bars 16 may be used by groove 14. Moreover, the number and distribution of the grooves 4, 8,

  14 in pallets 1, 11 are not limited to the

  rations shown in the example and the drawings and are not

only schematically represented.

  Manipulation of the compensation element 12 in relation to the processes during the change of battery at the feeder 18 or at the outlet 19 is also possible manually. The workflow remains

  however in principle the same. Moreover, it can be

  It is expected that the stack of sheets 20 will be delivered to the feeder 18 without compensation element and that the latter be used only at the outlet 19. Similarly,

  It is possible that the transport of pallets 11 and

  compensation 12 is automated.

  The automated manipulation of the compensation elements 12 during the change of battery in the feeder 18 or the outlet 19 is comparable to known systems for the so-called nonstop battery change and should not be described here in more detail. Essentially, there are provided auxiliary lifting devices which, during the battery change, during the formation of a partial stack, can realize for it a process of lifting or lowering the stack. In addition, the functions of bringing or removing the compensating elements 12 in the area or out of the area of the outlet 19 or the feeder 18 are necessary, this can also be done manually, if necessary, as indicated.

Claims (10)

  A device for stacking printing sheets (7) during an automated stack changeover on a sheet processing machine, having a feeder (18), an output and auxiliary pile lifting devices using pallets ( 1; 11) having stack surfaces intersected by groove-like interruptions (4; 8; 14) between bar-type bearing members (3; 9; 13) for insertion of auxiliary pile supports in the form of bars or rakes, characterized in that compensating elements (5; 10; 12) are provided which can be inserted into the groove-shaped interruptions (4; 8; together with the support members (3; 9; 13) of the bar type form a common surface in or about one plane, and that the compensating elements (5; 10;   12) form, with the pallets (1; 11), a unit.   Device according to claim 1, characterized in that the compensating elements (5; 10) can be raised and lowered in the groove-like interruptions (4; 8) so that they release the interruptions (4; 8) in the deepest position between the bar-type bearing elements (3; 9) and, in the uppermost position, are at least approximately at the level of the supporting elements (3; ) of the bar type, and in that the compensation elements   (5; 10) are connected to the pallets (1).   Device according to Claim 1, characterized in that the compensating elements (12) are arranged in the slots (14) in the form of grooves.   can be put in place and removed longitudinally-   movable, so that when the compensating elements   (12) are in place, their area is at least approximately the same as that of the bar-type bearing elements (13), and that when the compensating elements (12) are removed, the interruptions ( 14) in the form of grooves are released, and in that the compensating elements (5; 10; 12) are separable from the vanes (11). Device according to claim 2, characterized in that the compensating elements (5; 10) can be raised and lowered in grooves (4; 8) of the pallet (1) by means of a lifting device (6). ) connected to the pallet (1).   5. Device according to claims 2 and 4,   characterized in that the compensating elements (5) are   made in the form of bars and are adapted, in   groove (4) of the pallet (1).   6. Device according to claims 2 and 4,   characterized in that the compensating elements are constructed as a grid-like compensation device (10) and are adapted to the grooves in the form of a pattern   grooves (8) surrounding the support (9) of the stack surface of the pallet (1).   7. Device according to claim 3, characterized in that the compensation elements (12) are   made in the form of bars or rakes and are arranged in a groove (14) of the pallet (11) being able to be put in place or removed in a longitudinally mobile manner.   8. Device according to claims 3 and 7, characterized in that the compensation elements (12) are   formed as rakes with a transverse web (15) and support rods (16) connected thereto, and in that the support rods (16) are adapted to the grooves (14).   9. Device according to claims 3, 7 or 8,   characterized in that the compensating elements (12) have connection means to the auxiliary battery lifting devices on the feeder (18) or the outlet (19), and in that the auxiliary battery lifting devices have means to maintain the devices of   compensation (12), so that the compensating devices   (12) can be automatically raised and lowered in the feeder (18) or the outlet (19), as well as place and / or removed.   10. Method for effecting a battery change using   of a device according to claims 3 and 6 to 9,   characterized in that: - a pallet (11) with a stack of sheets (20) is fed to the feeder (18), - when changing the stack, a remainder of the stack of sheets (20) is received by holding and lifting of the compensation device (12) by means of an auxiliary device for lifting the stack of the feeder (18), - the pallet (11) is separated from the compensation device (12), removed from the feeder (18), and transported to the outlet (19), after having fed a new stack of sheets (20), the compensation device (12) is removed from the feeder (18), to join the remaining pile and the new stack of sheets (20), and is conveyed to the output (19), - at the beginning of the battery change at the output (19), a compensation device (12) is introduced into the output (19) and, to form a battery partial, is received by holding and lowering an auxiliary battery lifting device of the output (19), and - after evacuation of a complete battery outlet and supply of an empty pallet (11), it is raised against the partial stack and, thus, joined with the compensation device (12), the compensation device (12) then being released from the auxiliary device of stack lifting.